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Elements and Performance Criteria

1. Maintain oxygen mask
   • Oxygen mask is inspected for serviceability in accordance with standard procedures
   • Oxygen mask is tested for serviceability in accordance with standard procedures and manufacturer’s specifications
   • Identified faults beyond own authority to rectify are reported to supervisor and faulty oxygen mask is quarantined
   • Unserviceable parts of the oxygen mask are replaced in accordance with standards procedures while observing all relevant work health and safety (WHS) requirements, including the use of material safety data sheets (MSDS) and items of personal protective equipment (PPE)
   • Communication system components are tested in accordance with standard procedures
   • Oxygen mask is cleaned in accordance with standard procedures
   • Oxygen mask is presented for inspection by supervisor in accordance with standard procedures
   • Maintenance documentation is completed and processed in accordance with standard enterprise procedures
2. Fit oxygen mask
   • Fitting process is explained to the participant so that optimal fit can be achieved through relevant feedback
   • Participant is measured to select an appropriate size oxygen mask
   • Components of oxygen mask are adjusted to optimise fit
   • Integration of the oxygen mask and helmet is confirmed for correct function during operations
   • Oxygen mask fit is verified through participant feedback and by the supervisor
   • Relevant documentation is completed and processed in accordance with standard enterprise procedures

Range Statement

This field allows for different work environments and conditions that may affect performance. Essential operating conditions that may be present (depending on the work situation, needs of the candidate, accessibility of the item, and local industry and regional contexts) are included.
Standard procedures are found in any or all of:	Commonwealth/state/territory WHS legislation, regulations and codes Australian Standards Equipment manufacturers’ specifications and procedures Industry practices Safety manuals Maintenance schedules Work instructions Maintenance organisation manuals MSDS Defence regulations and instructions Standing instructions
Faults include:	Contamination Corrosion Cracks Excessive wearing Fraying Incorrect manufacture Intermittent communication Leaks Perishing
Parts of the oxygen mask include:	Communication system (e.g. microphone) Delivery tube Exo-skeleton (e.g. outer shell) Face piece (e.g. trimming) Retention system (e.g. strap) Valves
Communication system components include:	Microphone Electric cables Switches
Adjustable components include:	Retention system (e.g. strap) Seals

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Performance Evidence

Evidence required to demonstrate competency in this unit must be relevant to and satisfy all of the requirements of the elements and performance criteria under the specified conditions of assessment, and must include:

applying WHS practices relating to oxygen mask maintenance processes

using MSDS

using applicable tools, testing/measuring equipment and maintenance documentation to:

solder oxygen mask electronic/electrical components

test the operation of helmet electronic/electrical components

replace unserviceable components in accordance with approved procedures

select and use appropriate oxygen mask cleaning materials

correctly fit oxygen masks to users

safely using the oxygen test rig

cleaning and maintenance of equipment and tools

correctly disposing of hazardous waste.

The underlying skills inherent in this unit should be transferable across a range of aircraft life support equipment maintenance activities. It is essential that oxygen mask testing and inspection procedures, cleanliness requirements and safety precautions are fully observed, understood and complied with. Ability to interpret maintenance and fitting procedures and apply them in practice is critical.

This is to be demonstrated through demonstration of the ability to recognise faults and damage and perform appropriate repairs that are within the bounds of the individual’s authority, and through the demonstration of correct fitting procedures.

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Knowledge Evidence

Evidence required to demonstrate competency in this unit must be relevant to and satisfy all of the requirements of the elements and performance criteria and include knowledge of:

relevant enterprise procedures and maintenance publications

WHS procedures relating to oxygen mask maintenance

how to obtain MSDS

safety precautions relating to oxygen and the operation of the oxygen test rig

requirements for an oxygen mask servicing facility

oxygen in flight

components of an oxygen mask and their function

oxygen mask operation in relation to flight

oxygen regulator operation

physiological effects of flight

hypoxia

critical nature of maintaining and fitting oxygen masks

need to regularly assess correct fitment of oxygen masks

oxygen mask fitting procedures

fitting procedures relating to the fitment of oxygen masks to helmets

G forces

forces of ejection

basic electrical principles

environmental conditions that may affect oxygen equipment

approved cleaning methods for aviation life support equipment

handling, storage and transit procedures relating to life support equipment

handling and storage procedures for oxygen masks

types of corrosion and contamination that may affect oxygen masks

modification requirements for oxygen masks

oxygen mask repair procedures and limitations

soldering techniques

operation of testing and measuring equipment and tools used to maintain oxygen masks

use and storage of adhesives.

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